SIREN, SIRET, APE, EORI and other abbreviations

7 min read

Table of Contents

The basic idea
SIREN: the identity number of the business
SIRET: the identity number of an establishment
APE/NAF code: the main activity code
VAT number: the intracommunity VAT number
- Do all businesses have a VAT number?
EORI: the customs identification number
Other abbreviations worth adding
Common mistakes I see
Final practical advice

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Updated on 7 June 2026